S-92979A156 1/4"-20 x 7/8" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-plated steel coating extends service life and maintains integrity in harsh environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections, minimizing loosening over time.
• Integrated flange design eliminates the need for separate washers, speeding up assembly and distributing load more effectively.
• Grade 5 strength classification guarantees consistent mechanical properties, meeting rigorous SAE J429 standards for dependable use.
• Coarse UNC threading allows for quicker installation and better performance in materials prone to stripping or cross-threading.
• Full threading along the 7/8" length offers maximum grip and adjustability, ideal for varying material thicknesses.

Professional Applications & Engineering Value

Engineered for demanding environments, this Grade 5 zinc-plated steel hex head screw combines high tensile strength and Rockwell C25 hardness to withstand heavy loads and repetitive stress, addressing common issues like joint failure and corrosion in machinery, construction, and automotive assemblies. The UNC coarse thread with Class 3A fit ensures rapid, secure fastening in coarse-grained materials, reducing installation time while enhancing vibration resistance. Its flanged design provides built-in washer functionality, simplifying inventory and improving clamp load distribution. Ideal for industrial fastening in equipment frames, structural supports, and other heavy-duty applications, this screw delivers long-term reliability and compliance with key industry standards.

Specification Summary & Compliance

This fastener features a 1/4"-20 UNC thread with Class 3A fit for precise dimensional accuracy, and meets IFI 111 / SAE J429 specifications for Grade 5 mechanical properties. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to in industrial supply chains.